CN Quality Check
Standards Comparison Tool
GB 5023 vs IEC 60227 — Certified Technical Comparison
EXECUTIVE SUMMARY
Scope: 450/750 V PVC-insulated cables (聚氯乙烯绝缘电缆) — GB 5023.1–7-2008 vs IEC 60227-1–7, plus adjacent cable sub-categories (rubber, XLPE power, fire-performance). GB 5023 is largely MOD of IEC 60227 (conductor classes, voltage ratings, insulation thicknesses aligned), but CCC certification and GB 31247 fire classification create non-tariff barriers. Key implication: technical equivalence is high, yet Chinese market access requires CCC + GB 31247 class declaration — neither is satisfied by IEC 60227 test reports alone.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB 5023.1-2008 | 额定电压450/750V及以下聚氯乙烯绝缘电缆 第1部分：一般要求 (PVC-insulated cables ≤450/750V — Part 1: General) | General requirements | Recommended | Current |
| GB 5023.2–.7-2008 | 同上 第2–7部分 (Parts 2–7: methods & specific cable types) | Test methods, sheathed/flexible cords | Recommended | Current |
| GB/T 3956-2008 | 电缆的导体 (Conductors of insulated cables) | Conductor classes 1/2/5/6 | Recommended | Current |
| GB/T 2951 series | 电缆和光缆绝缘和护套材料通用试验方法 (Test methods for insulating/sheathing materials) | Mechanical/thermal tests | Recommended | Current |
| GB/T 5013.5-2008 | 额定电压450/750V及以下橡皮绝缘电缆 第5部分：电梯电缆 (Rubber-insulated cables — Part 5: Lift cables) | Rubber flexible cables | Recommended | Current |
| GB 31247-2014 | 电缆及光缆燃烧性能分级 (Classification for burning behaviour of cables) | Fire class A/B1/B2 + smoke/acid | Mandatory | Current |
| GB/T 19666-2019 | 阻燃和耐火电线电缆或光缆通则 (General rules for flame-retardant/fire-resistant cables) | FR/FR-cable requirements | Recommended | Current |
| GB/T 12706.3-2002 | 额定电压1kV到35kV挤包绝缘电力电缆 (XLPE power cables 1–35 kV) | MV power cable | Recommended | WITHDRAWN (废止) — verify current replacement |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| GB 5023.1–7-2008 | TIER 1 — Product Standard | PVC cable product requirements |
| IEC 60227-1–7 | TIER 1 — Product Standard | Same, international |
| GB/T 3956-2008 / IEC 60228 | TIER 2 — Component/Test | Conductor class definition |
| GB/T 2951 / IEC 60811 | TIER 2 — Test Method | Material test methods |
| GB 31247-2014 / EN 50575 | TIER 4 — Classification | Fire performance classes |
FLAG: GB 31247 (TIER 4) is frequently cited alongside GB 5023 (TIER 1) in tenders — valid only as a supplementary fire-class requirement, not as a product-standard substitute.
SCOPE BREAKDOWN
A. PVC-insulated wiring cables (anchor)
Chinese standard: GB 5023.1–7-2008 — 额定电压450/750V及以下聚氯乙烯绝缘电缆 (PVC-insulated cables ≤450/750 V)
International equivalent: IEC 60227-1–7 — Polyvinyl chloride insulated cables ≤450/750 V — current editions
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Rated voltage | 450/750 V (GB 5023.1-2008 §4) | 450/750 V (IEC 60227-1 §4) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Conductor class | Class 1/2/5 per GB/T 3956-2008 | Class 1/2/5 per IEC 60228 | identical classes | 直接互认 (Direct mutual recognition) | LOW |
| Max conductor temp | 70 °C PVC (GB 5023.1-2008 §4) | 70 °C PVC (IEC 60227-1) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Insulation thickness | Tabulated per cross-section [Verify: GB 5023.1-2008 §5] | Tabulated per cross-section [Verify: IEC 60227-1 Table] | near-identical, verify per size | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| Voltage test | 2.0 kV / 5 min [Verify: GB 5023.2-2008] | 2.0 kV / 5 min [Verify: IEC 60227-2] | identical | 直接互认 (Direct mutual recognition) | LOW |
| Fire class | GB 31247-2014 class required | EN 50575 CPR class | different classification schemes | 不可互认 (Not mutually recognised) | HIGH |
B. Rubber-insulated flexible cables
Chinese standard: GB/T 5013.5-2008 — 橡皮绝缘电缆 第5部分：电梯电缆 (Rubber-insulated cables — Part 5: Lift cables)
International equivalent: IEC 60245-5 — Rubber insulated cables — Part 5 — current edition
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Rated voltage | 300/500 V (GB/T 5013.5-2008 §4) | 300/500 V (IEC 60245-5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Conductor temp | 60 °C rubber [Verify: GB/T 5013.5-2008 §4] | 60 °C [Verify: IEC 60245-5] | identical | 直接互认 (Direct mutual recognition) | LOW |
C. XLPE medium-voltage power cables
Chinese standard: GB/T 12706.3-2002 — WITHDRAWN (废止); verify current replacement edition before use
International equivalent: IEC 60502-2 — Power cables 1–30 kV — current edition
Equivalence: MOD (assumed; cannot confirm against withdrawn edition)
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Rated voltage | 1–35 kV [Verify: current GB/T 12706 replacement] | 1–30 kV (IEC 60502-2) | voltage range differs | 附加测试后互认 (Mutual recognition after additional testing) | HIGH |
⚠️ GB/T 12706.3-2002 is WITHDRAWN — do not cite in procurement; obtain current edition.
D. Fire-performance cables
Chinese standard: GB 31247-2014 (Mandatory) + GB/T 19666-2019
International equivalent: EN 50575-2014+A1:2016 (CPR)
Equivalence: NEQ
Standard tier match: Both TIER 4 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Fire class scheme | A / B1 / B2 + S1–S3 + a1–a3 (GB 31247-2014 §4) | Aca–Fca + s1–s3 + d0–d2 + a1–a3 (EN 50575) | different class labels | 不可互认 (Not mutually recognised) | HIGH |
KEY DIFFERENCES SUMMARY
- Standard designation: Current series is GB 5023.x-2008 (recommended). The 1997 series (GB 5023.x-1997) was mandatory; mandatory status now flows via CCC certification, not the standard prefix. — 直接互认 (Direct mutual recognition) on technical content; procurement impact LOW.
- Fire classification: GB 31247-2014 vs EN 50575 — different class schemes, no mapping. — 不可互认 (Not mutually recognised); HIGH.
- MV cable standard: GB/T 12706.3-2002 WITHDRAWN — must source current edition. — 附加测试后互认 (Mutual recognition after additional testing); HIGH.
- Insulation thickness tables: near-identical but size-by-size verification required. — 附加测试后互认 (Mutual recognition after additional testing); MEDIUM.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | CCC (电线电缆强制性认证) | UL Listing / CE (CPR) / UKCA |
| Engineering acceptance inspection | GB 50303-2015 (建筑电气工程施工质量验收规范) | IEC 60364 / local wiring regs |
| Import/export compliance | CCIB commodity inspection | Destination customs + CPR DoP |
| Designer/engineer obligation | GB 50210-2018 (装修工程验收) | Local building regulation / Eurocode |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB 5023.1-2008 — official status CURRENT; no supersession note added.
- ✅ RESOLVED: GB/T 5013.5-2008 — CURRENT; no supersession note.
- ✅ RESOLVED: GB 31247-2014 — CURRENT; no supersession note.
- 🔴 CRITICAL CORRECTION: GB/T 12706.3-2002 is WITHDRAWN (废止) — Answer A/B treated it as usable; must be replaced with current edition.
- ✅ FALSE POSITIVE (domain flag): "GB 5023.x mandatory" — the 2008 series is correctly GB/T; mandatory status is via CCC, not the prefix.
- ⚠️ UNRESOLVED: Insulation thickness tables — verify against GB 5023.1-2008 §5 and IEC 60227-1.
PROCUREMENT VERDICT
- Confirm cable is certified to GB 5023.x-2008 (current) — reject 1997-edition references.
- Obtain CCC certificate — IEC 60227 test reports alone are insufficient for China market access.
- Require GB 31247-2014 fire class declaration (A/B1/B2 + S/a) — EN 50575 class is not accepted.
- For MV cable, source current GB/T 12706 edition — GB/T 12706.3-2002 is withdrawn.
- Verify conductor class (1/2/5) against GB/T 3956-2008 for the specific application.
- For rubber/lift cables, confirm GB/T 5013.5-2008 compliance separately.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB 5023.1-2008 §4–§5 — voltage rating, temperature, insulation thickness
- GB 5023.2-2008 — voltage test method
- GB/T 3956-2008 — conductor class definitions
- GB 31247-2014 §4 — fire class scheme
- GB/T 12706 (current edition) — MV cable requirements
- GB 50303-2015 — installation acceptance
FIELD INSPECTION CHECKLIST
- Verify cable marking shows GB 5023.x-2008 and CCC mark.
- Confirm conductor class matches specification (Class 1/2/5).
- Check insulation thickness against GB 5023.1-2008 §5 table.
- Verify GB 31247-2014 fire class label on drum/certificate.
- Confirm voltage test certificate (2.0 kV / 5 min).
- For MV cable, confirm current GB/T 12706 edition on test report.
CONFIDENCE RATING
🟡 MEDIUM — core equivalence (voltage, temperature, conductor class) verified across both sources; insulation thickness tables and current GB/T 12706 edition flagged for official text confirmation.
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